Have you tried calling a good known number like one of your own (that isn't the callback)

The views show stale data?

Go into the menu and select "Refresh"

Information to include when reporting an issue

Your version of Dialcentral

Information from the steps you followed above

From what tab are you having issues (Dialpad, Recent, Messages, Account Info)?

Is it a US or international number?

(For the advanced) Could you post the contents of "~/.dialcentral/dialcentral.log"

For serious users and serious problems (Google changes the "API") is the following command:

/opt/dialcentral/lib/backends/gvoice/gvoice.py USERNAME PASSWORD

Note that this writes a bunch of files with sensitive information to the current working directory. Please gather those up, scrub them if desired, and send them to me directly to avoid sensitive information from being leaked out.